envconfig: Add missing MachineInfo is_<os> methods

mesonlib defines is_sunos, is_dragonflybsd, and is_freebsd, which
MachineInfo does not. This should be corrected.

1 files changed, 13 insertions, 0 deletions

diff --git a/mesonbuild/envconfig.py b/mesonbuild/envconfig.py
index 5889eb1..ab39b0d 100644
--- a/mesonbuild/envconfig.py
+++ b/mesonbuild/envconfig.py
@@ -245,6 +245,19 @@ class MachineInfo:
         """
         return self.system == 'openbsd'
 
+    def is_dragonflybsd(self) -> bool:
+        """Machine is DragonflyBSD?"""
+        return self.system == 'dragonfly'
+
+    def is_freebsd(self) -> bool:
+        """Machine is FreeBSD?"""
+        return self.system == 'freebsd'
+
+    def is_sunos(self) -> bool:
+        """Machine is illumos or Solaris?"""
+        return self.system == 'sunos'
+
+
     # Various prefixes and suffixes for import libraries, shared libraries,
     # static libraries, and executables.
     # Versioning is added to these names in the backends as-needed.